The core objective of ETB (Electrical Test Bench) testing is to verify the coordinated operation between payloads and platform subsystems, flight software functions, electrical interfaces between components, and overall system functionality. To support ETB testing, the research team developed EGSE (Electrical Ground Support Equipment) to provide data support and validation during the testing process. For hardware components that were not yet manufactured at the time of testing, their functions were simulated via software to ensure the smooth progress of the tests.
The sequence of ETB assembly and testing is shown in the figure, with the specific process as follows:
- After assembly, integrate the EGSE-MPS (EGSE-Main Power Supply) with the data processing system and test the debugging state;
- Integrate the EPS (Electrical Power Subsystem) with the EGSE to verify electrical performance and data transmission/reception functions;
- Repeat the above steps for the payload and ADCS (Attitude Determination and Control Subsystem) to verify the performance of individual mission scenarios and the operational status throughout the entire operation phase, while validating the overall performance in the system-integrated state;
- Finally, conduct fault management testing on the entire system integration to detect faults during operation—if any component enters a fault state, confirm whether the system can switch to safe mode and achieve recovery.
ETB Assembly and Testing Process.
